<template>
    <div>
         <!-- 商品分类导航 -->
         <div class="type-nav">
            <div class="container">
             <div class="nav-left" @mouseleave="handleMouseLeave">
                <h2 class="all" @mouseenter="isShowNav = true">全部商品分类</h2>
                 <div class="sort" v-show="isShowNav">
                    <div class="all-sort-list2" @click="btnSearch">
                        <div class="item" v-for="c1 in categoryList.slice(0,-2)" :key="c1.categoryId">
                            <h3>
                                <a href="javascript:;" data-level="1" :data-id="c1.categoryId" :data-name="c1.categoryName">{{c1.categoryName}}</a>
                            </h3>
                            <div class="item-list clearfix">
                                <div class="subitem">
                                    <dl class="fore" v-for="c2 in c1.categoryChild" :key="c2.categoryId">
                                        <dt>
                                            <a href="javascript:;" data-level="2" :data-id="c2.categoryId" :data-name="c2.categoryName">{{c2.categoryName}}</a>
                                        </dt>
                                        <dd>
                                            <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                                                <a href="javascript:;" data-level="3" :data-id="c3.categoryId" :data-name="c3.categoryName">{{c3.categoryName}}</a>
                                            </em>
                                        </dd>
                                    </dl>
                                </div>
                            </div>
                        </div>
                    </div>
                 </div>
				</div>
                <nav class="nav">
                    <a href="###">服装城</a>
                    <a href="###">美妆馆</a>
                    <a href="###">尚品汇超市</a>
                    <a href="###">全球购</a>
                    <a href="###">闪购</a>
                    <a href="###">团购</a>
                    <a href="###">有趣</a>
                    <a href="###">秒杀</a>
                </nav>
            </div>
        </div>
    </div>
</template>

<script>
import { mapState } from 'vuex'
// import ajax from "@/api/ajax"
// import {reqCategoryListData} from "../../../api"
    export default {
        name:"TypeNave",
        data(){
            return{
                isShowNav:""
            }
        },
        methods:{
            //三级导航列表点击跳转
            btnSearch(e){
                //1.直接跳转到search页面
                // this.$router.push("/Search")
                //2.拼接参数,自定义data标签获取
                const {level,id,name} = e.target.dataset
                // 3.跳转的时候参数拼接
                // /search?categoryName=家居家装&category1Id=5
                // let category;
                // category ="category"+ level + "Id"
                // console.log(category);
                // 4.点击空白不能跳转
                if(!level) return;
                const {params} = this.$route
                this.$router.push({
                   name:"search",
                   query:{
                    categoryName:name,
                    ["category"+ level + "Id"]:id
                   },
                   params
                })

            },
            //是否隐藏下拉三级列表,鼠标移出
            handleMouseLeave(){
                 if(!this.$route.meta.isshowNav){
                    this.isShowNav = false;
                }
            }
        },
        mounted(){
        // ajax.get('/product/getBaseCategoryList').then(
        //   result=>console.log(result),
        //     error=>console.log(error.message)
        //    ) 
        //  reqCategoryListData().then(
        //         result=>{console.log(result);
        //         err=>{console.log(err);}
        //         }
        //     )

        //触发store中的actions方法异步去请求数据，获得三级导航数据，优化请求，防止每次点击的时候都要发送请求，放在APP.vue中
        // this.$store.dispatch('home/getCategoryListData')

        // 一开始需要三级导航判断显示还是隐藏
        if(this.$route.meta.isshowNav){
            this.isShowNav = true;
        }

        },
        computed:{
            //辅助函数从vuex中映射过来的数据（state中的），相当于data中的数据，在上面的template模板中可以直接使用
             ...mapState("home",["categoryList"])
        }
    }
</script>

<style lang="less" scoped>
.type-nav {
        border-bottom: 2px solid #e1251b;

        .container {
            width: 1200px;
            margin: 0 auto;
            display: flex;
            position: relative;

            .all {
                width: 210px;
                height: 45px;
                background-color: #e1251b;
                line-height: 45px;
                text-align: center;
                color: #fff;
                font-size: 14px;
                font-weight: bold;
                cursor: pointer;
            }

            .nav {
                a {
                    height: 45px;
                    margin: 0 22px;
                    line-height: 45px;
                    font-size: 16px;
                    color: #333;
                }
            }

            .sort {
                position: absolute;
                left: 0;
                top: 45px;
                width: 210px;
                height: 461px;
                position: absolute;
                background: #fafafa;
                z-index: 999;
                border-top:2px solid red;

                .all-sort-list2 {
                    .item {
                        h3 {
                            line-height: 30px;
                            font-size: 14px;
                            font-weight: 400;
                            overflow: hidden;
                            padding: 0 20px;
                            margin: 0;

                            a {
                                color: #333;
                                text-decoration: none;
                            }
                        }
                        &:hover{
                            background-color: yellow;
                        }

                        .item-list {
                            display: none;
                            position: absolute;
                            width: 734px;
                            min-height: 460px;
                            background: #f7f7f7;
                            left: 210px;
                            border: 1px solid #ddd;
                            top: 0;
                            z-index: 9999 !important;

                            .subitem {
                                float: left;
                                width: 650px;
                                padding: 0 4px 0 8px;

                                dl {
                                    border-top: 1px solid #eee;
                                    padding: 6px 0;
                                    overflow: hidden;
                                    zoom: 1;

                                    &.fore {
                                        border-top: 0;
                                    }

                                    dt {
                                        float: left;
                                        width: 54px;
                                        line-height: 22px;
                                        text-align: right;
                                        padding: 3px 6px 0 0;
                                        font-weight: 700;
                                    }

                                    dd {
                                        float: left;
                                        width: 415px;
                                        padding: 3px 0 0;
                                        overflow: hidden;

                                        em {
                                            float: left;
                                            height: 14px;
                                            line-height: 14px;
                                            padding: 0 8px;
                                            margin-top: 5px;
                                            border-left: 1px solid #ccc;
                                        }
                                    }
                                }
                            }
                        }

                        &:hover {
                            .item-list {
                                display: block;
                            }
                        }
                    }
                }
            }
        }
    }
</style>